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  <title>The RecursiveIteratorIterator class</title>

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 <h1 class="title">The RecursiveIteratorIterator class</h1>
 

 <div class="partintro"><p class="verinfo">(PHP 5)</p>


  <div class="section" id="recursiveiteratoriterator.intro">
   <h2 class="title">简介</h2>
   <p class="para">
    Can be used to iterate through recursive iterators.
   </p>
  </div>


  <div class="section" id="recursiveiteratoriterator.synopsis">
   <h2 class="title">类摘要</h2>


   <div class="classsynopsis">
    <div class="ooclass"></div>


    <div class="classsynopsisinfo">
     <span class="ooclass">
      <strong class="classname">RecursiveIteratorIterator</strong>
     </span>

     <span class="oointerface">implements 
      <span class="interfacename"><a href="class.outeriterator.html" class="interfacename">OuterIterator</a></span>
     </span>

     {</div>


    <div class="classsynopsisinfo classsynopsisinfo_comment">/* Constants */</div>
    <div class="fieldsynopsis">
     <span class="modifier">const</span>
     <span class="type">integer</span>
      <var class="fieldsynopsis_varname"><a href="class.recursiveiteratoriterator.html#recursiveiteratoriterator.constants.leaves-only"><var class="varname">LEAVES_ONLY</var></a></var>
     <span class="initializer"> = 0</span>
    ;</div>

    <div class="fieldsynopsis">
     <span class="modifier">const</span>
     <span class="type">integer</span>
      <var class="fieldsynopsis_varname"><a href="class.recursiveiteratoriterator.html#recursiveiteratoriterator.constants.self-first"><var class="varname">SELF_FIRST</var></a></var>
     <span class="initializer"> = 1</span>
    ;</div>

    <div class="fieldsynopsis">
     <span class="modifier">const</span>
     <span class="type">integer</span>
      <var class="fieldsynopsis_varname"><a href="class.recursiveiteratoriterator.html#recursiveiteratoriterator.constants.child-first"><var class="varname">CHILD_FIRST</var></a></var>
     <span class="initializer"> = 2</span>
    ;</div>

    <div class="fieldsynopsis">
     <span class="modifier">const</span>
     <span class="type">integer</span>
      <var class="fieldsynopsis_varname"><a href="class.recursiveiteratoriterator.html#recursiveiteratoriterator.constants.catch-get-child"><var class="varname">CATCH_GET_CHILD</var></a></var>
     <span class="initializer"> = 16</span>
    ;</div>


    <div class="classsynopsisinfo classsynopsisinfo_comment">/* 方法 */</div>
    <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="recursiveiteratoriterator.beginchildren.html" class="methodname">beginChildren</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="recursiveiteratoriterator.beginiteration.html" class="methodname">beginIteration</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">RecursiveIterator</span><span class="methodname"><a href="recursiveiteratoriterator.callgetchildren.html" class="methodname">callGetChildren</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">bool</span><span class="methodname"><a href="recursiveiteratoriterator.callhaschildren.html" class="methodname">callHasChildren</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><a href="recursiveiteratoriterator.construct.html" class="methodname">__construct</a></span>
    ( <span class="methodparam"><span class="type"><a href="class.traversable.html" class="type Traversable">Traversable</a></span> <code class="parameter">$iterator</code></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$mode</code><span class="initializer"> = RecursiveIteratorIterator::LEAVES_ONLY</span></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$flags</code><span class="initializer"> = 0</span></span>
  ]] )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">mixed</span><span class="methodname"><a href="recursiveiteratoriterator.current.html" class="methodname">current</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="recursiveiteratoriterator.endchildren.html" class="methodname">endChildren</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="recursiveiteratoriterator.enditeration.html" class="methodname">endIteration</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">int</span><span class="methodname"><a href="recursiveiteratoriterator.getdepth.html" class="methodname">getDepth</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">iterator</span><span class="methodname"><a href="recursiveiteratoriterator.getinneriterator.html" class="methodname">getInnerIterator</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">mixed</span><span class="methodname"><a href="recursiveiteratoriterator.getmaxdepth.html" class="methodname">getMaxDepth</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">RecursiveIterator</span><span class="methodname"><a href="recursiveiteratoriterator.getsubiterator.html" class="methodname">getSubIterator</a></span>
    ([ <span class="methodparam"><span class="type">int</span> <code class="parameter">$level</code></span>
  ] )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">mixed</span><span class="methodname"><a href="recursiveiteratoriterator.key.html" class="methodname">key</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="recursiveiteratoriterator.next.html" class="methodname">next</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="recursiveiteratoriterator.nextelement.html" class="methodname">nextElement</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="recursiveiteratoriterator.rewind.html" class="methodname">rewind</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="recursiveiteratoriterator.setmaxdepth.html" class="methodname">setMaxDepth</a></span>
    ([ <span class="methodparam"><span class="type">string</span> <code class="parameter">$max_depth</code><span class="initializer"> = -1</span></span>
  ] )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">bool</span><span class="methodname"><a href="recursiveiteratoriterator.valid.html" class="methodname">valid</a></span>
    ( <span class="methodparam">void</span>
   )</div>


    <div class="classsynopsisinfo classsynopsisinfo_comment">/* 继承的方法 */</div>
    <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">Iterator</span><span class="methodname"><a href="outeriterator.getinneriterator.html" class="methodname">OuterIterator::getInnerIterator</a></span>
    ( <span class="methodparam">void</span>
   )</div>

   }</div>

  </div>


  <div class="section" id="recursiveiteratoriterator.constants">
   <h2 class="title">预定义常量</h2>
   <dl>


    
     <dt id="recursiveiteratoriterator.constants.leaves-only"><strong><code>RecursiveIteratorIterator::LEAVES_ONLY</code></strong></dt>

     <dd>

      <p class="para"/>
     </dd>

    

    
     <dt id="recursiveiteratoriterator.constants.self-first"><strong><code>RecursiveIteratorIterator::SELF_FIRST</code></strong></dt>

     <dd>

      <p class="para"/>
     </dd>

    

    
     <dt id="recursiveiteratoriterator.constants.child-first"><strong><code>RecursiveIteratorIterator::CHILD_FIRST</code></strong></dt>

     <dd>

      <p class="para"/>
     </dd>

    

    
     <dt id="recursiveiteratoriterator.constants.catch-get-child"><strong><code>RecursiveIteratorIterator::CATCH_GET_CHILD</code></strong></dt>

     <dd>

      <p class="para"/>
     </dd>

    

   </dl>

  </div>


 </div>

 
























































































































<h2>Table of Contents</h2><ul class="chunklist chunklist_reference"><li><a href="recursiveiteratoriterator.beginchildren.html">RecursiveIteratorIterator::beginChildren</a> — Begin children</li><li><a href="recursiveiteratoriterator.beginiteration.html">RecursiveIteratorIterator::beginIteration</a> — Begin Iteration</li><li><a href="recursiveiteratoriterator.callgetchildren.html">RecursiveIteratorIterator::callGetChildren</a> — Get children</li><li><a href="recursiveiteratoriterator.callhaschildren.html">RecursiveIteratorIterator::callHasChildren</a> — Has children</li><li><a href="recursiveiteratoriterator.construct.html">RecursiveIteratorIterator::__construct</a> — Construct a RecursiveIteratorIterator</li><li><a href="recursiveiteratoriterator.current.html">RecursiveIteratorIterator::current</a> — Access the current element value</li><li><a href="recursiveiteratoriterator.endchildren.html">RecursiveIteratorIterator::endChildren</a> — End children</li><li><a href="recursiveiteratoriterator.enditeration.html">RecursiveIteratorIterator::endIteration</a> — End Iteration</li><li><a href="recursiveiteratoriterator.getdepth.html">RecursiveIteratorIterator::getDepth</a> — Get the current depth of the recursive iteration</li><li><a href="recursiveiteratoriterator.getinneriterator.html">RecursiveIteratorIterator::getInnerIterator</a> — Get inner iterator</li><li><a href="recursiveiteratoriterator.getmaxdepth.html">RecursiveIteratorIterator::getMaxDepth</a> — Get max depth</li><li><a href="recursiveiteratoriterator.getsubiterator.html">RecursiveIteratorIterator::getSubIterator</a> — The current active sub iterator</li><li><a href="recursiveiteratoriterator.key.html">RecursiveIteratorIterator::key</a> — Access the current key</li><li><a href="recursiveiteratoriterator.next.html">RecursiveIteratorIterator::next</a> — Move forward to the next element</li><li><a href="recursiveiteratoriterator.nextelement.html">RecursiveIteratorIterator::nextElement</a> — Next element</li><li><a href="recursiveiteratoriterator.rewind.html">RecursiveIteratorIterator::rewind</a> — Rewind the iterator to the first element of the top level inner iterator</li><li><a href="recursiveiteratoriterator.setmaxdepth.html">RecursiveIteratorIterator::setMaxDepth</a> — Set max depth</li><li><a href="recursiveiteratoriterator.valid.html">RecursiveIteratorIterator::valid</a> — Check whether the current position is valid</li></ul>
</div>
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